When creating data bases always bear in mind:
Syntax: Username_Data Base Name
Example: If your username is xz0123erw, valid data base names would be, amongst others:
xz0123erw_forum or
xz0123erw_data base or the like.
If you create a data base named “forum” without taking a prefix, the server will deny it with the message
#1044 - Access denied for user: 'xz00123erw@%' to data base 'forum'